We will see you again next Saturday. ______, you must rest as much as possible and take good care of yourself．

A．However

B．Meanwhile

C．Otherwise

D．Therefore

经批准，对走私犯罪嫌疑人，可以扣留，但扣留时间不得超过( )。

A．24小时

B．36小时

C．48小时

D．72小时